Received: 9 February 2019
Accepted: 29 July 2019
First Online: 16 August 2019
Change Date: 28 October 2019
Change Type: Correction
Change Details: In the original publication of this article , there was a mistake in Figure 2. Figure 2a and Fig 2c should be swapped. The revised Figure 2 is shown below.
Ethics approval and consent to participate
: Cedars Sinai Medical Center IRB: Pro00027337 approval was gained on 17 July 2017 for the retrospective chart review of records of curettage patients between 1994 to 2015.
: Not applicable.
: The authors declare that they have no competing interests.